from django.contrib import admin
from django.utils.html import format_html
from django.urls import reverse
from simple_history.admin import SimpleHistoryAdmin
from .models import (
    Computer,
    Monitor,
    Peripheral,
    DigitalCertificate,
    MaintenanceRecord,
    DecommissionRecord,
    HandoverProtocol,
)
from .models import DecommissionRecord

# --- Inlines for Computer ---
# class MaintenanceInlineComputer(admin.TabularInline):
#     model = MaintenanceRecord
#     fk_name = "computer"
#     extra = 0


# class DecommissionInlineComputer(admin.StackedInline):
#     model = DecommissionRecord
#     fk_name = "computer"
#     extra = 0
#     max_num = 1


# # --- Inlines for Monitor ---
# class MaintenanceInlineMonitor(admin.TabularInline):
#     model = MaintenanceRecord
#     fk_name = "monitor"
#     extra = 0


# class DecommissionInlineMonitor(admin.StackedInline):
#     model = DecommissionRecord
#     fk_name = "monitor"
#     extra = 0
#     max_num = 1


# # --- Inlines for Peripheral ---
# class MaintenanceInlinePeripheral(admin.TabularInline):
#     model = MaintenanceRecord
#     fk_name = "peripheral"
#     extra = 0


# class DecommissionInlinePeripheral(admin.StackedInline):
#     model = DecommissionRecord
#     fk_name = "peripheral"
#     extra = 0
#     max_num = 1


@admin.register(Computer)
class ComputerAdmin(SimpleHistoryAdmin):
    list_display = ("equipment_code", "oem_name", "status", "assigned_to", "entry_date")
    list_filter = ("status", "entry_date", "assigned_to")
    search_fields = ("equipment_code", "oem_name", "mac_address", "observations")
    # inlines = [MaintenanceInlineComputer, DecommissionInlineComputer]


@admin.register(Monitor)
class MonitorAdmin(SimpleHistoryAdmin):
    list_display = ("equipment_code", "name", "status", "assigned_to", "entry_date")
    list_filter = ("status", "entry_date", "assigned_to")
    search_fields = ("equipment_code", "name", "serial_number")
    # inlines = [MaintenanceInlineMonitor, DecommissionInlineMonitor]


@admin.register(Peripheral)
class PeripheralAdmin(SimpleHistoryAdmin):
    list_display = (
        "equipment_code",
        "name",
        "peripheral_type",
        "status",
        "assigned_to",
    )
    list_filter = ("status", "peripheral_type", "entry_date", "assigned_to")
    search_fields = ("equipment_code", "name", "serial_number")
    # inlines = [MaintenanceInlinePeripheral, DecommissionInlinePeripheral]


@admin.register(DigitalCertificate)
class DigitalCertificateAdmin(SimpleHistoryAdmin):
    list_display = (
        "get_certificate_type_display",
        "assigned_to",
        "issue_date",
        "expiration_date",
        "is_canceled",
    )
    list_filter = ("certificate_type", "is_canceled", "issue_date")
    search_fields = ("assigned_to__name", "assigned_to__username")


# Optionally register the records independently so they can be searched globally
@admin.register(MaintenanceRecord)
class MaintenanceRecordAdmin(SimpleHistoryAdmin):
    list_display = ("date", "operation_type", "performed_by")
    list_filter = ("date", "operation_type")
    search_fields = ("description", "performed_by")


@admin.register(DecommissionRecord)
class DecommissionRecordAdmin(SimpleHistoryAdmin):
    list_display = ("document_number", "date", "reason")
    list_filter = ("date",)
    search_fields = ("document_number", "reason")


@admin.register(HandoverProtocol)
class HandoverProtocolAdmin(SimpleHistoryAdmin):
    list_display = (
        "document_number",
        "date",
        "previous_holder",
        "new_holder",
        "it_validator",
        "print_protocol_button",
    )
    list_filter = ("date", "it_validator")
    filter_horizontal = ("computers", "monitors", "peripherals")
    # Make these fields read-only so they cannot be manually overwritten
    readonly_fields = ("document_number", "it_validator")

    def save_model(self, request, obj, form, change):
        if not obj.it_validator:
            # Captures the logged-in user's name automatically
            obj.it_validator = request.user.get_full_name() or request.user.username
        super().save_model(request, obj, form, change)

    def print_protocol_button(self, obj):
        if obj.pk:
            url = reverse("equipment:print_handover", args=[obj.pk])
            return format_html(
                '<a class="button" href="{}" target="_blank" style="background-color: #417690; color: white; padding: 5px 10px; border-radius: 4px; text-decoration: none;">🖨️ Printează PV</a>',
                url,
            )
        return "-"

    print_protocol_button.short_description = "Acțiune"

    # @admin.register(DecommissionRecord)
    # class DecommissionRecordAdmin(SimpleHistoryAdmin):
    #     list_display = ("document_number", "date", "reason")
    #     search_fields = ("document_number", "reason")
    #     list_filter = ("date",)

    # Acest filter_horizontal va crea o interfață cu două coloane foarte utilă
    # pentru a selecta ușor multiple echipamente din stânga în dreapta
    filter_horizontal = ("computers", "monitors", "peripherals")